Micrel, Inc.

MIC45116 Evaluation Board

Features

Feedback Resistors

The output voltage on the MIC45116 evaluation board,

which is preset to 1.8V, is determined by the feedback

divider, as illustrated in Equation 1:













+

×

=

BOTTOM

REF

OUT

R

R51

1

V

V

Eq. 1

resistor.

feedback headers gives a 0.8V output voltage. All other

value according to Equation 2:

REF

OUT

REF

BOTTOM

V

V

V

R51

R

−

×

=

Eq. 2

Note that the output voltage should not be set to exceed

5V unless the output capacitor (C6) is replaced with a

higher voltage rating.

Table 1. Typical Values of Some Components

VIN

R51

(Top Feedback Resistor)

R

(Bottom Feedback Resistor)

C12

1.0V

5V to 20V

10kΩ

40.2kΩ

1.0nF

100µF/6.3V

1.2V

5V to 20V

10kΩ

20.0kΩ

1.0nF

100µF/6.3V

1.5V

5V to 20V

10kΩ

11.5kΩ

1.0nF

100µF/6.3V

1.8V

5V to 20V

10kΩ

8.06kΩ

1.0nF

100µF/6.3V

2.5V

5V to 20V

10kΩ

4.75kΩ

1.0nF

100µF/6.3V

3.3V

5V to 20V

10kΩ

3.24kΩ

1.0nF

100µF/6.3V

5V

7V to 20V

10kΩ

1.91kΩ

1.0nF

100µF/6.3V

March 12, 2015

2

Revision 1.0